The NSW Vinnies Community Sleepout will be held on Friday, August 27. Participants will spend the night in the cold at the Old Dubbo Gaol.

St Vincent de Paul member Dan Sullivan said all of the money raised would be used to help local families and individuals.

"All funds raised from this event will go towards supporting the local Vinnies Dubbo Care and Support members who assist people in our local district communities," Mr Sullivan said.

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"Care and support members provide assistance to those families or individuals experiencing or at risk of homelessness due to family or domestic violence, leaving prison, loss of employment and difficulty finding employment."

Mr Sullivan said at June there were 399 people on the general waiting list for social housing in the Dubbo allocation zone and another 20 people on the priority waiting list.

Andrew McKay has already signed up for this year's Vinnies Community Sleepout.

While he's taken part three or four times, it's usually been in a heated hall.

Mr McKay admitted this year would be a lot colder but said the sleepout made you appreciate what you had.

People can register to take part in the sleepout, or donate to one of the Dubbo participants at vinnies.org.au/communitysleepout.